D4 Insight Senior Product Engineer Interview Questions and Answers

Round duration - 60 minutes
Round difficulty - Easy

Technical interview round with questions on DSA and DBMS mainly.

Q1. 
Maximum Sum Subarray Problem Statement
Given an array ARR consisting of N integers, determine the sum of the subarray with the maximum sum, including the possibility of an empty subarray.
A subarray is a...read more
Ans. 
Find the sum of the subarray with the maximum sum in a given array.
• Iterate through the array and keep track of the current sum and maximum sum.

• Update the maximum sum if the current sum becomes greater.

• Handle cases where the array has all negative numbers or empty subarray.

• Example: For input [-2, 1, -3, 4, -1], the maximum sum subarray is [4] with sum 4.
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Q2. 
Prime Numbers Identification
Given a positive integer N, your task is to identify all prime numbers less than or equal to N.
Explanation:
A prime number is a natural number greater than 1 that has no po...read more
Ans. 
Identify all prime numbers less than or equal to a given positive integer N.
• Iterate from 2 to N and check if each number is prime

• Use the Sieve of Eratosthenes algorithm for efficient prime number identification

• Optimize by only checking numbers up to square root of N for divisibility
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Q3. What are Joins in the context of databases?
Ans. 
Joins in databases are used to combine rows from two or more tables based on a related column between them.
• Joins are used to retrieve data from multiple tables based on a related column.

• Common types of joins include INNER JOIN, LEFT JOIN, RIGHT JOIN, and FULL JOIN.

• INNER JOIN returns rows when there is at least one match in both tables.

• LEFT JOIN returns all rows from the left table and the matched rows from the right ta...read more
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Round duration - 30 minutes
Round difficulty - Easy

Typical HR round with behavioral problems.

Hackerrank Test

Q1. Questions related to NodeJS and Javascript Basics
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Q1. Technical questions based on past experience
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Q1. Company Culture related
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Q1. Expectations and Processes
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The aptitude test was of moderate level.

It checked on the concepts of oops

Q1. How will you deal with tight delivery time.
Ans. 
I will prioritize tasks, communicate effectively with team members, and utilize time management techniques to meet deadlines.
• Prioritize tasks based on importance and urgency

• Break down tasks into smaller manageable chunks

• Communicate effectively with team members to coordinate efforts

• Utilize time management techniques such as Pomodoro technique or Agile methodologies

• Identify and eliminate any potential roadblocks or bott...read more
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Q1. Tell me about projects you have worked upon
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Q2. PEP-8 standards
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Q1. Architecture of project on which you were working
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Q2. Pandas and Numpy
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Q1. Tell me your Current CTC
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Q2. Tell me your Expected CTC
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